The rehabilitation operation concerns a set of 149 collective housing units of the residence Les 4 Fleurs in Nogent sur Oise. This residence will benefit from a program of thermal rehabilitation work due to a significant management cost and requiring an improvement in the comfort and living environment of its occupants. The two main objectives of this rehabilitation are the thermal improvement of housing and the fire compliance of the building, with a switch from the energy label E to a BBC 104 Effinergie label.